How Can I Play This Game If My Level Is Maxed Out at the Beginning?

Chu Xun, who had been playing games all night for several days, fell asleep in front of the computer. When he woke up, Chu Xun found that he had traveled through the game. Chu Xun traveled into the game and became a necromancer. However, after Chu Xun received the memory, he discovered that this level 100 necromancer was the culprit who summoned him. "How can I play this game if I'm at max level at the beginning and still have a necromancer who can summon souls from other worlds?" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.